release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/bfa/bfa_log.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 /**
  19  *  bfa_log.c BFA log library
  20  */
  21
  22 #include <bfa_os_inc.h>
  23 #include <cs/bfa_log.h>
  24
  25 /*
  26  * global log info structure
  27  */
  28 struct bfa_log_info_s {
  29         u32        start_idx;   /*  start index for a module */
  30         u32        total_count; /*  total count for a module */
  31         enum bfa_log_severity level;    /*  global log level */
  32         bfa_log_cb_t    cbfn;           /*  callback function */
  33 };
  34
  35 static struct bfa_log_info_s bfa_log_info[BFA_LOG_MODULE_ID_MAX + 1];
  36 static u32 bfa_log_msg_total_count;
  37 static int      bfa_log_initialized;
  38
  39 static char    *bfa_log_severity[] =
  40         { "[none]", "[critical]", "[error]", "[warn]", "[info]", "" };
  41
  42 /**
  43  * BFA log library initialization
  44  *
  45  * The log library initialization includes the following,
  46  *    - set log instance name and callback function
  47  *    - read the message array generated from xml files
  48  *    - calculate start index for each module
  49  *    - calculate message count for each module
  50  *    - perform error checking
  51  *
  52  * @param[in] log_mod - log module info
  53  * @param[in] instance_name - instance name
  54  * @param[in] cbfn - callback function
  55  *
  56  * It return 0 on success, or -1 on failure
  57  */
  58 int
  59 bfa_log_init(struct bfa_log_mod_s *log_mod, char *instance_name,
  60                         bfa_log_cb_t cbfn)
  61 {
  62         struct bfa_log_msgdef_s *msg;
  63         u32        pre_mod_id = 0;
  64         u32        cur_mod_id = 0;
  65         u32        i, pre_idx, idx, msg_id;
  66
  67         /*
  68          * set instance name
  69          */
  70         if (log_mod) {
  71                 strncpy(log_mod->instance_info, instance_name,
  72                         sizeof(log_mod->instance_info));
  73                 log_mod->cbfn = cbfn;
  74                 for (i = 0; i <= BFA_LOG_MODULE_ID_MAX; i++)
  75                         log_mod->log_level[i] = BFA_LOG_WARNING;
  76         }
  77
  78         if (bfa_log_initialized)
  79                 return 0;
  80
  81         for (i = 0; i <= BFA_LOG_MODULE_ID_MAX; i++) {
  82                 bfa_log_info[i].start_idx = 0;
  83                 bfa_log_info[i].total_count = 0;
  84                 bfa_log_info[i].level = BFA_LOG_WARNING;
  85                 bfa_log_info[i].cbfn = cbfn;
  86         }
  87
  88         pre_idx = 0;
  89         idx = 0;
  90         msg = bfa_log_msg_array;
  91         msg_id = BFA_LOG_GET_MSG_ID(msg);
  92         pre_mod_id = BFA_LOG_GET_MOD_ID(msg_id);
  93         while (msg_id != 0) {
  94                 cur_mod_id = BFA_LOG_GET_MOD_ID(msg_id);
  95
  96                 if (cur_mod_id > BFA_LOG_MODULE_ID_MAX) {
  97                         cbfn(log_mod, msg_id,
  98                                 "%s%s log: module id %u out of range\n",
  99                                 BFA_LOG_CAT_NAME,
 100                                 bfa_log_severity[BFA_LOG_ERROR],
 101                                 cur_mod_id);
 102                         return -1;
 103                 }
 104
 105                 if (pre_mod_id > BFA_LOG_MODULE_ID_MAX) {
 106                         cbfn(log_mod, msg_id,
 107                                 "%s%s log: module id %u out of range\n",
 108                                 BFA_LOG_CAT_NAME,
 109                                 bfa_log_severity[BFA_LOG_ERROR],
 110                                 pre_mod_id);
 111                         return -1;
 112                 }
 113
 114                 if (cur_mod_id != pre_mod_id) {
 115                         bfa_log_info[pre_mod_id].start_idx = pre_idx;
 116                         bfa_log_info[pre_mod_id].total_count = idx - pre_idx;
 117                         pre_mod_id = cur_mod_id;
 118                         pre_idx = idx;
 119                 }
 120
 121                 idx++;
 122                 msg++;
 123                 msg_id = BFA_LOG_GET_MSG_ID(msg);
 124         }
 125
 126         bfa_log_info[cur_mod_id].start_idx = pre_idx;
 127         bfa_log_info[cur_mod_id].total_count = idx - pre_idx;
 128         bfa_log_msg_total_count = idx;
 129
 130         cbfn(log_mod, msg_id, "%s%s log: init OK, msg total count %u\n",
 131                 BFA_LOG_CAT_NAME,
 132                 bfa_log_severity[BFA_LOG_INFO], bfa_log_msg_total_count);
 133
 134         bfa_log_initialized = 1;
 135
 136         return 0;
 137 }
 138
 139 /**
 140  * BFA log set log level for a module
 141  *
 142  * @param[in] log_mod - log module info
 143  * @param[in] mod_id - module id
 144  * @param[in] log_level - log severity level
 145  *
 146  * It return BFA_STATUS_OK on success, or > 0 on failure
 147  */
 148 bfa_status_t
 149 bfa_log_set_level(struct bfa_log_mod_s *log_mod, int mod_id,
 150                   enum bfa_log_severity log_level)
 151 {
 152         if (mod_id <= BFA_LOG_UNUSED_ID || mod_id > BFA_LOG_MODULE_ID_MAX)
 153                 return BFA_STATUS_EINVAL;
 154
 155         if (log_level <= BFA_LOG_INVALID || log_level > BFA_LOG_LEVEL_MAX)
 156                 return BFA_STATUS_EINVAL;
 157
 158         if (log_mod)
 159                 log_mod->log_level[mod_id] = log_level;
 160         else
 161                 bfa_log_info[mod_id].level = log_level;
 162
 163         return BFA_STATUS_OK;
 164 }
 165
 166 /**
 167  * BFA log set log level for all modules
 168  *
 169  * @param[in] log_mod - log module info
 170  * @param[in] log_level - log severity level
 171  *
 172  * It return BFA_STATUS_OK on success, or > 0 on failure
 173  */
 174 bfa_status_t
 175 bfa_log_set_level_all(struct bfa_log_mod_s *log_mod,
 176                   enum bfa_log_severity log_level)
 177 {
 178         int mod_id = BFA_LOG_UNUSED_ID + 1;
 179
 180         if (log_level <= BFA_LOG_INVALID || log_level > BFA_LOG_LEVEL_MAX)
 181                 return BFA_STATUS_EINVAL;
 182
 183         if (log_mod) {
 184                 for (; mod_id <= BFA_LOG_MODULE_ID_MAX; mod_id++)
 185                         log_mod->log_level[mod_id] = log_level;
 186         } else {
 187                 for (; mod_id <= BFA_LOG_MODULE_ID_MAX; mod_id++)
 188                         bfa_log_info[mod_id].level = log_level;
 189         }
 190
 191         return BFA_STATUS_OK;
 192 }
 193
 194 /**
 195  * BFA log set log level for all aen sub-modules
 196  *
 197  * @param[in] log_mod - log module info
 198  * @param[in] log_level - log severity level
 199  *
 200  * It return BFA_STATUS_OK on success, or > 0 on failure
 201  */
 202 bfa_status_t
 203 bfa_log_set_level_aen(struct bfa_log_mod_s *log_mod,
 204                   enum bfa_log_severity log_level)
 205 {
 206         int mod_id = BFA_LOG_AEN_MIN + 1;
 207
 208         if (log_mod) {
 209                 for (; mod_id <= BFA_LOG_AEN_MAX; mod_id++)
 210                         log_mod->log_level[mod_id] = log_level;
 211         } else {
 212                 for (; mod_id <= BFA_LOG_AEN_MAX; mod_id++)
 213                         bfa_log_info[mod_id].level = log_level;
 214         }
 215
 216         return BFA_STATUS_OK;
 217 }
 218
 219 /**
 220  * BFA log get log level for a module
 221  *
 222  * @param[in] log_mod - log module info
 223  * @param[in] mod_id - module id
 224  *
 225  * It returns log level or -1 on error
 226  */
 227 enum bfa_log_severity
 228 bfa_log_get_level(struct bfa_log_mod_s *log_mod, int mod_id)
 229 {
 230         if (mod_id <= BFA_LOG_UNUSED_ID || mod_id > BFA_LOG_MODULE_ID_MAX)
 231                 return BFA_LOG_INVALID;
 232
 233         if (log_mod)
 234                 return log_mod->log_level[mod_id];
 235         else
 236                 return bfa_log_info[mod_id].level;
 237 }
 238
 239 enum bfa_log_severity
 240 bfa_log_get_msg_level(struct bfa_log_mod_s *log_mod, u32 msg_id)
 241 {
 242         struct bfa_log_msgdef_s *msg;
 243         u32        mod = BFA_LOG_GET_MOD_ID(msg_id);
 244         u32        idx = BFA_LOG_GET_MSG_IDX(msg_id) - 1;
 245
 246         if (!bfa_log_initialized)
 247                 return BFA_LOG_INVALID;
 248
 249         if (mod > BFA_LOG_MODULE_ID_MAX)
 250                 return BFA_LOG_INVALID;
 251
 252         if (idx >= bfa_log_info[mod].total_count) {
 253                 bfa_log_info[mod].cbfn(log_mod, msg_id,
 254                         "%s%s log: inconsistent idx %u vs. total count %u\n",
 255                         BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR], idx,
 256                         bfa_log_info[mod].total_count);
 257                 return BFA_LOG_INVALID;
 258         }
 259
 260         msg = bfa_log_msg_array + bfa_log_info[mod].start_idx + idx;
 261         if (msg_id != BFA_LOG_GET_MSG_ID(msg)) {
 262                 bfa_log_info[mod].cbfn(log_mod, msg_id,
 263                         "%s%s log: inconsistent msg id %u array msg id %u\n",
 264                         BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR],
 265                         msg_id, BFA_LOG_GET_MSG_ID(msg));
 266                 return BFA_LOG_INVALID;
 267         }
 268
 269         return BFA_LOG_GET_SEVERITY(msg);
 270 }
 271
 272 /**
 273  * BFA log message handling
 274  *
 275  * BFA log message handling finds the message based on message id and prints
 276  * out the message based on its format and arguments. It also does prefix
 277  * the severity etc.
 278  *
 279  * @param[in] log_mod - log module info
 280  * @param[in] msg_id - message id
 281  * @param[in] ... - message arguments
 282  *
 283  * It return 0 on success, or -1 on errors
 284  */
 285 int
 286 bfa_log(struct bfa_log_mod_s *log_mod, u32 msg_id, ...)
 287 {
 288         va_list         ap;
 289         char            buf[256];
 290         struct bfa_log_msgdef_s *msg;
 291         int             log_level;
 292         u32        mod = BFA_LOG_GET_MOD_ID(msg_id);
 293         u32        idx = BFA_LOG_GET_MSG_IDX(msg_id) - 1;
 294
 295         if (!bfa_log_initialized)
 296                 return -1;
 297
 298         if (mod > BFA_LOG_MODULE_ID_MAX)
 299                 return -1;
 300
 301         if (idx >= bfa_log_info[mod].total_count) {
 302                 bfa_log_info[mod].
 303                         cbfn
 304                         (log_mod, msg_id,
 305                         "%s%s log: inconsistent idx %u vs. total count %u\n",
 306                         BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR], idx,
 307                         bfa_log_info[mod].total_count);
 308                 return -1;
 309         }
 310
 311         msg = bfa_log_msg_array + bfa_log_info[mod].start_idx + idx;
 312         if (msg_id != BFA_LOG_GET_MSG_ID(msg)) {
 313                 bfa_log_info[mod].
 314                         cbfn
 315                         (log_mod, msg_id,
 316                         "%s%s log: inconsistent msg id %u array msg id %u\n",
 317                         BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR],
 318                         msg_id, BFA_LOG_GET_MSG_ID(msg));
 319                 return -1;
 320         }
 321
 322         log_level = log_mod ? log_mod->log_level[mod] : bfa_log_info[mod].level;
 323         if ((BFA_LOG_GET_SEVERITY(msg) > log_level) &&
 324                         (msg->attributes != BFA_LOG_ATTR_NONE))
 325                 return 0;
 326
 327         va_start(ap, msg_id);
 328         bfa_os_vsprintf(buf, BFA_LOG_GET_MSG_FMT_STRING(msg), ap);
 329         va_end(ap);
 330
 331         if (log_mod)
 332                 log_mod->cbfn(log_mod, msg_id, "%s[%s]%s%s %s: %s\n",
 333                                 BFA_LOG_CAT_NAME, log_mod->instance_info,
 334                                 bfa_log_severity[BFA_LOG_GET_SEVERITY(msg)],
 335                                 (msg->attributes & BFA_LOG_ATTR_AUDIT)
 336                                 ? " (audit) " : "", msg->msg_value, buf);
 337         else
 338                 bfa_log_info[mod].cbfn(log_mod, msg_id, "%s%s%s %s: %s\n",
 339                                 BFA_LOG_CAT_NAME,
 340                                 bfa_log_severity[BFA_LOG_GET_SEVERITY(msg)],
 341                                 (msg->attributes & BFA_LOG_ATTR_AUDIT) ?
 342                                 " (audit) " : "", msg->msg_value, buf);
 343
 344         return 0;
 345 }